diff options
Diffstat (limited to 'sound/soc/soc-core.c')
| -rw-r--r-- | sound/soc/soc-core.c | 840 |
1 files changed, 624 insertions, 216 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 16c7453f4946..b098c0b4c584 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -26,6 +26,7 @@ #include <linux/delay.h> #include <linux/pm.h> #include <linux/bitops.h> +#include <linux/debugfs.h> #include <linux/platform_device.h> #include <sound/core.h> #include <sound/pcm.h> @@ -34,18 +35,23 @@ #include <sound/soc-dapm.h> #include <sound/initval.h> -/* debug */ -#define SOC_DEBUG 0 -#if SOC_DEBUG -#define dbg(format, arg...) printk(format, ## arg) -#else -#define dbg(format, arg...) -#endif - static DEFINE_MUTEX(pcm_mutex); static DEFINE_MUTEX(io_mutex); static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq); +#ifdef CONFIG_DEBUG_FS +static struct dentry *debugfs_root; +#endif + +static DEFINE_MUTEX(client_mutex); +static LIST_HEAD(card_list); +static LIST_HEAD(dai_list); +static LIST_HEAD(platform_list); +static LIST_HEAD(codec_list); + +static int snd_soc_register_card(struct snd_soc_card *card); +static int snd_soc_unregister_card(struct snd_soc_card *card); + /* * This is a timeout to do a DAPM powerdown after a stream is closed(). * It can be used to eliminate pops between different playback streams, e.g. @@ -107,20 +113,6 @@ static int soc_ac97_dev_register(struct snd_soc_codec *codec) } #endif -static inline const char *get_dai_name(int type) -{ - switch (type) { - case SND_SOC_DAI_AC97_BUS: - case SND_SOC_DAI_AC97: - return "AC97"; - case SND_SOC_DAI_I2S: - return "I2S"; - case SND_SOC_DAI_PCM: - return "PCM"; - } - return NULL; -} - /* * Called by ALSA when a PCM substream is opened, the runtime->hw record is * then initialized and any private data can be allocated. This also calls @@ -130,9 +122,10 @@ static int soc_pcm_open(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; + struct snd_soc_card *card = socdev->card; struct snd_pcm_runtime *runtime = substream->runtime; struct snd_soc_dai_link *machine = rtd->dai; - struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_platform *platform = card->platform; struct snd_soc_dai *cpu_dai = machine->cpu_dai; struct snd_soc_dai *codec_dai = machine->codec_dai; int ret = 0; @@ -141,7 +134,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream) /* startup the audio subsystem */ if (cpu_dai->ops.startup) { - ret = cpu_dai->ops.startup(substream); + ret = cpu_dai->ops.startup(substream, cpu_dai); if (ret < 0) { printk(KERN_ERR "asoc: can't open interface %s\n", cpu_dai->name); @@ -158,7 +151,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream) } if (codec_dai->ops.startup) { - ret = codec_dai->ops.startup(substream); + ret = codec_dai->ops.startup(substream, codec_dai); if (ret < 0) { printk(KERN_ERR "asoc: can't open codec %s\n", codec_dai->name); @@ -228,12 +221,12 @@ static int soc_pcm_open(struct snd_pcm_substream *substream) goto machine_err; } - dbg("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name); - dbg("asoc: rate mask 0x%x\n", runtime->hw.rates); - dbg("asoc: min ch %d max ch %d\n", runtime->hw.channels_min, - runtime->hw.channels_max); - dbg("asoc: min rate %d max rate %d\n", runtime->hw.rate_min, - runtime->hw.rate_max); + pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name); + pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates); + pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min, + runtime->hw.channels_max); + pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min, + runtime->hw.rate_max); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) cpu_dai->playback.active = codec_dai->playback.active = 1; @@ -255,7 +248,7 @@ codec_dai_err: platform_err: if (cpu_dai->ops.shutdown) - cpu_dai->ops.shutdown(substream); + cpu_dai->ops.shutdown(substream, cpu_dai); out: mutex_unlock(&pcm_mutex); return ret; @@ -268,8 +261,9 @@ out: */ static void close_delayed_work(struct work_struct *work) { - struct snd_soc_device *socdev = - container_of(work, struct snd_soc_device, delayed_work.work); + struct snd_soc_card *card = container_of(work, struct snd_soc_card, + delayed_work.work); + struct snd_soc_device *socdev = card->socdev; struct snd_soc_codec *codec = socdev->codec; struct snd_soc_dai *codec_dai; int i; @@ -278,18 +272,18 @@ static void close_delayed_work(struct work_struct *work) for (i = 0; i < codec->num_dai; i++) { codec_dai = &codec->dai[i]; - dbg("pop wq checking: %s status: %s waiting: %s\n", - codec_dai->playback.stream_name, - codec_dai->playback.active ? "active" : "inactive", - codec_dai->pop_wait ? "yes" : "no"); + pr_debug("pop wq checking: %s status: %s waiting: %s\n", + codec_dai->playback.stream_name, + codec_dai->playback.active ? "active" : "inactive", + codec_dai->pop_wait ? "yes" : "no"); /* are we waiting on this codec DAI stream */ if (codec_dai->pop_wait == 1) { /* Reduce power if no longer active */ if (codec->active == 0) { - dbg("pop wq D1 %s %s\n", codec->name, - codec_dai->playback.stream_name); + pr_debug("pop wq D1 %s %s\n", codec->name, + codec_dai->playback.stream_name); snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE); } @@ -301,8 +295,8 @@ static void close_delayed_work(struct work_struct *work) /* Fall into standby if no longer active */ if (codec->active == 0) { - dbg("pop wq D3 %s %s\n", codec->name, - codec_dai->playback.stream_name); + pr_debug("pop wq D3 %s %s\n", codec->name, + codec_dai->playback.stream_name); snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY); } @@ -320,8 +314,9 @@ static int soc_codec_close(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; + struct snd_soc_card *card = socdev->card; struct snd_soc_dai_link *machine = rtd->dai; - struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_platform *platform = card->platform; struct snd_soc_dai *cpu_dai = machine->cpu_dai; struct snd_soc_dai *codec_dai = machine->codec_dai; struct snd_soc_codec *codec = socdev->codec; @@ -346,10 +341,10 @@ static int soc_codec_close(struct snd_pcm_substream *substream) snd_soc_dai_digital_mute(codec_dai, 1); if (cpu_dai->ops.shutdown) - cpu_dai->ops.shutdown(substream); + cpu_dai->ops.shutdown(substream, cpu_dai); if (codec_dai->ops.shutdown) - codec_dai->ops.shutdown(substream); + codec_dai->ops.shutdown(substream, codec_dai); if (machine->ops && machine->ops->shutdown) machine->ops->shutdown(substream); @@ -361,7 +356,7 @@ static int soc_codec_close(struct snd_pcm_substream *substream) if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { /* start delayed pop wq here for playback streams */ codec_dai->pop_wait = 1; - schedule_delayed_work(&socdev->delayed_work, + schedule_delayed_work(&card->delayed_work, msecs_to_jiffies(pmdown_time)); } else { /* capture streams can be powered down now */ @@ -387,8 +382,9 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; + struct snd_soc_card *card = socdev->card; struct snd_soc_dai_link *machine = rtd->dai; - struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_platform *platform = card->platform; struct snd_soc_dai *cpu_dai = machine->cpu_dai; struct snd_soc_dai *codec_dai = machine->codec_dai; struct snd_soc_codec *codec = socdev->codec; @@ -413,7 +409,7 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream) } if (codec_dai->ops.prepare) { - ret = codec_dai->ops.prepare(substream); + ret = codec_dai->ops.prepare(substream, codec_dai); if (ret < 0) { printk(KERN_ERR "asoc: codec DAI prepare error\n"); goto out; @@ -421,58 +417,49 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream) } if (cpu_dai->ops.prepare) { - ret = cpu_dai->ops.prepare(substream); + ret = cpu_dai->ops.prepare(substream, cpu_dai); if (ret < 0) { printk(KERN_ERR "asoc: cpu DAI prepare error\n"); goto out; } } - /* we only want to start a DAPM playback stream if we are not waiting - * on an existing one stopping */ - if (codec_dai->pop_wait) { - /* we are waiting for the delayed work to start */ - if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) - snd_soc_dapm_stream_event(socdev->codec, - codec_dai->capture.stream_name, - SND_SOC_DAPM_STREAM_START); - else { - codec_dai->pop_wait = 0; - cancel_delayed_work(&socdev->delayed_work); - snd_soc_dai_digital_mute(codec_dai, 0); - } - } else { - /* no delayed work - do we need to power up codec */ - if (codec->bias_level != SND_SOC_BIAS_ON) { + /* cancel any delayed stream shutdown that is pending */ + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && + codec_dai->pop_wait) { + codec_dai->pop_wait = 0; + cancel_delayed_work(&card->delayed_work); + } - snd_soc_dapm_set_bias_level(socdev, - SND_SOC_BIAS_PREPARE); + /* do we need to power up codec */ + if (codec->bias_level != SND_SOC_BIAS_ON) { + snd_soc_dapm_set_bias_level(socdev, + SND_SOC_BIAS_PREPARE); - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) - snd_soc_dapm_stream_event(codec, + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + snd_soc_dapm_stream_event(codec, codec_dai->playback.stream_name, SND_SOC_DAPM_STREAM_START); - else - snd_soc_dapm_stream_event(codec, + else + snd_soc_dapm_stream_event(codec, codec_dai->capture.stream_name, SND_SOC_DAPM_STREAM_START); - snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_ON); - snd_soc_dai_digital_mute(codec_dai, 0); + snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_ON); + snd_soc_dai_digital_mute(codec_dai, 0); - } else { - /* codec already powered - power on widgets */ - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) - snd_soc_dapm_stream_event(codec, + } else { + /* codec already powered - power on widgets */ + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + snd_soc_dapm_stream_event(codec, codec_dai->playback.stream_name, SND_SOC_DAPM_STREAM_START); - else - snd_soc_dapm_stream_event(codec, + else + snd_soc_dapm_stream_event(codec, codec_dai->capture.stream_name, SND_SOC_DAPM_STREAM_START); - snd_soc_dai_digital_mute(codec_dai, 0); - } + snd_soc_dai_digital_mute(codec_dai, 0); } out: @@ -491,7 +478,8 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_dai_link *machine = rtd->dai; - struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_card *card = socdev->card; + struct snd_soc_platform *platform = card->platform; struct snd_soc_dai *cpu_dai = machine->cpu_dai; struct snd_soc_dai *codec_dai = machine->codec_dai; int ret = 0; @@ -507,7 +495,7 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream, } if (codec_dai->ops.hw_params) { - ret = codec_dai->ops.hw_params(substream, params); + ret = codec_dai->ops.hw_params(substream, params, codec_dai); if (ret < 0) { printk(KERN_ERR "asoc: can't set codec %s hw params\n", codec_dai->name); @@ -516,7 +504,7 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream, } if (cpu_dai->ops.hw_params) { - ret = cpu_dai->ops.hw_params(substream, params); + ret = cpu_dai->ops.hw_params(substream, params, cpu_dai); if (ret < 0) { printk(KERN_ERR "asoc: interface %s hw params failed\n", cpu_dai->name); @@ -539,11 +527,11 @@ out: platform_err: if (cpu_dai->ops.hw_free) - cpu_dai->ops.hw_free(substream); + cpu_dai->ops.hw_free(substream, cpu_dai); interface_err: if (codec_dai->ops.hw_free) - codec_dai->ops.hw_free(substream); + codec_dai->ops.hw_free(substream, codec_dai); codec_err: if (machine->ops && machine->ops->hw_free) @@ -561,7 +549,8 @@ static int soc_pcm_hw_free(struct snd_pcm_substream *substream) struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_dai_link *machine = rtd->dai; - struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_card *card = socdev->card; + struct snd_soc_platform *platform = card->platform; struct snd_soc_dai *cpu_dai = machine->cpu_dai; struct snd_soc_dai *codec_dai = machine->codec_dai; struct snd_soc_codec *codec = socdev->codec; @@ -582,10 +571,10 @@ static int soc_pcm_hw_free(struct snd_pcm_substream *substream) /* now free hw params for the DAI's */ if (codec_dai->ops.hw_free) - codec_dai->ops.hw_free(substream); + codec_dai->ops.hw_free(substream, codec_dai); if (cpu_dai->ops.hw_free) - cpu_dai->ops.hw_free(substream); + cpu_dai->ops.hw_free(substream, cpu_dai); mutex_unlock(&pcm_mutex); return 0; @@ -595,14 +584,15 @@ static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; + struct snd_soc_card *card= socdev->card; struct snd_soc_dai_link *machine = rtd->dai; - struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_platform *platform = card->platform; struct snd_soc_dai *cpu_dai = machine->cpu_dai; struct snd_soc_dai *codec_dai = machine->codec_dai; int ret; if (codec_dai->ops.trigger) { - ret = codec_dai->ops.trigger(substream, cmd); + ret = codec_dai->ops.trigger(substream, cmd, codec_dai); if (ret < 0) return ret; } @@ -614,7 +604,7 @@ static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) } if (cpu_dai->ops.trigger) { - ret = cpu_dai->ops.trigger(substream, cmd); + ret = cpu_dai->ops.trigger(substream, cmd, cpu_dai); if (ret < 0) return ret; } @@ -636,8 +626,8 @@ static struct snd_pcm_ops soc_pcm_ops = { static int soc_suspend(struct platform_device *pdev, pm_message_t state) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); - struct snd_soc_machine *machine = socdev->machine; - struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_card *card = socdev->card; + struct snd_soc_platform *platform = card->platform; struct snd_soc_codec_device *codec_dev = socdev->codec_dev; struct snd_soc_codec *codec = socdev->codec; int i; @@ -653,29 +643,29 @@ static int soc_suspend(struct platform_device *pdev, pm_message_t state) snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot); /* mute any active DAC's */ - for (i = 0; i < machine->num_links; i++) { - struct snd_soc_dai *dai = machine->dai_link[i].codec_dai; - if (dai->dai_ops.digital_mute && dai->playback.active) - dai->dai_ops.digital_mute(dai, 1); + for (i = 0; i < card->num_links; i++) { + struct snd_soc_dai *dai = card->dai_link[i].codec_dai; + if (dai->ops.digital_mute && dai->playback.active) + dai->ops.digital_mute(dai, 1); } /* suspend all pcms */ - for (i = 0; i < machine->num_links; i++) - snd_pcm_suspend_all(machine->dai_link[i].pcm); + for (i = 0; i < card->num_links; i++) + snd_pcm_suspend_all(card->dai_link[i].pcm); - if (machine->suspend_pre) - machine->suspend_pre(pdev, state); + if (card->suspend_pre) + card->suspend_pre(pdev, state); - for (i = 0; i < machine->num_links; i++) { - struct snd_soc_dai *cpu_dai = machine->dai_link[i].cpu_dai; - if (cpu_dai->suspend && cpu_dai->type != SND_SOC_DAI_AC97) - cpu_dai->suspend(pdev, cpu_dai); + for (i = 0; i < card->num_links; i++) { + struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; + if (cpu_dai->suspend && !cpu_dai->ac97_control) + cpu_dai->suspend(cpu_dai); if (platform->suspend) - platform->suspend(pdev, cpu_dai); + platform->suspend(cpu_dai); } /* close any waiting streams and save state */ - run_delayed_work(&socdev->delayed_work); + run_delayed_work(&card->delayed_work); codec->suspend_bias_level = codec->bias_level; for (i = 0; i < codec->num_dai; i++) { @@ -692,14 +682,14 @@ static int soc_suspend(struct platform_device *pdev, pm_message_t state) if (codec_dev->suspend) codec_dev->suspend(pdev, state); - for (i = 0; i < machine->num_links; i++) { - struct snd_soc_dai *cpu_dai = machine->dai_link[i].cpu_dai; - if (cpu_dai->suspend && cpu_dai->type == SND_SOC_DAI_AC97) - cpu_dai->suspend(pdev, cpu_dai); + for (i = 0; i < card->num_links; i++) { + struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; + if (cpu_dai->suspend && cpu_dai->ac97_control) + cpu_dai->suspend(cpu_dai); } - if (machine->suspend_post) - machine->suspend_post(pdev, state); + if (card->suspend_post) + card->suspend_post(pdev, state); return 0; } @@ -709,11 +699,11 @@ static int soc_suspend(struct platform_device *pdev, pm_message_t state) */ static void soc_resume_deferred(struct work_struct *work) { - struct snd_soc_device *socdev = container_of(work, - struct snd_soc_device, - deferred_resume_work); - struct snd_soc_machine *machine = socdev->machine; - struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_card *card = container_of(work, + struct snd_soc_card, + deferred_resume_work); + struct snd_soc_device *socdev = card->socdev; + struct snd_soc_platform *platform = card->platform; struct snd_soc_codec_device *codec_dev = socdev->codec_dev; struct snd_soc_codec *codec = socdev->codec; struct platform_device *pdev = to_platform_device(socdev->dev); @@ -723,15 +713,15 @@ static void soc_resume_deferred(struct work_struct *work) * so userspace apps are blocked from touching us */ - dev_info(socdev->dev, "starting resume work\n"); + dev_dbg(socdev->dev, "starting resume work\n"); - if (machine->resume_pre) - machine->resume_pre(pdev); + if (card->resume_pre) + card->resume_pre(pdev); - for (i = 0; i < machine->num_links; i++) { - struct snd_soc_dai *cpu_dai = machine->dai_link[i].cpu_dai; - if (cpu_dai->resume && cpu_dai->type == SND_SOC_DAI_AC97) - cpu_dai->resume(pdev, cpu_dai); + for (i = 0; i < card->num_links; i++) { + struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; + if (cpu_dai->resume && cpu_dai->ac97_control) + cpu_dai->resume(cpu_dai); } if (codec_dev->resume) @@ -749,24 +739,24 @@ static void soc_resume_deferred(struct work_struct *work) } /* unmute any active DACs */ - for (i = 0; i < machine->num_links; i++) { - struct snd_soc_dai *dai = machine->dai_link[i].codec_dai; - if (dai->dai_ops.digital_mute && dai->playback.active) - dai->dai_ops.digital_mute(dai, 0); + for (i = 0; i < card->num_links; i++) { + struct snd_soc_dai *dai = card->dai_link[i].codec_dai; + if (dai->ops.digital_mute && dai->playback.active) + dai->ops.digital_mute(dai, 0); } - for (i = 0; i < machine->num_links; i++) { - struct snd_soc_dai *cpu_dai = machine->dai_link[i].cpu_dai; - if (cpu_dai->resume && cpu_dai->type != SND_SOC_DAI_AC97) - cpu_dai->resume(pdev, cpu_dai); + for (i = 0; i < card->num_links; i++) { + struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; + if (cpu_dai->resume && !cpu_dai->ac97_control) + cpu_dai->resume(cpu_dai); if (platform->resume) - platform->resume(pdev, cpu_dai); + platform->resume(cpu_dai); } - if (machine->resume_post) - machine->resume_post(pdev); + if (card->resume_post) + card->resume_post(pdev); - dev_info(socdev->dev, "resume work completed\n"); + dev_dbg(socdev->dev, "resume work completed\n"); /* userspace can access us now we are back as we were before */ snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0); @@ -776,11 +766,12 @@ static void soc_resume_deferred(struct work_struct *work) static int soc_resume(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_card *card = socdev->card; - dev_info(socdev->dev, "scheduling resume work\n"); + dev_dbg(socdev->dev, "scheduling resume work\n"); - if (!schedule_work(&socdev->deferred_resume_work)) - dev_err(socdev->dev, "work item may be lost\n"); + if (!schedule_work(&card->deferred_resume_work)) + dev_err(socdev->dev, "resume work item may be lost\n"); return 0; } @@ -790,23 +781,83 @@ static int soc_resume(struct platform_device *pdev) #define soc_resume NULL #endif -/* probes a new socdev */ -static int soc_probe(struct platform_device *pdev) +static void snd_soc_instantiate_card(struct snd_soc_card *card) { - int ret = 0, i; - struct snd_soc_device *socdev = platform_get_drvdata(pdev); - struct snd_soc_machine *machine = socdev->machine; - struct snd_soc_platform *platform = socdev->platform; - struct snd_soc_codec_device *codec_dev = socdev->codec_dev; + struct platform_device *pdev = container_of(card->dev, + struct platform_device, + dev); + struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev; + struct snd_soc_platform *platform; + struct snd_soc_dai *dai; + int i, found, ret, ac97; + + if (card->instantiated) + return; + + found = 0; + list_for_each_entry(platform, &platform_list, list) + if (card->platform == platform) { + found = 1; + break; + } + if (!found) { + dev_dbg(card->dev, "Platform %s not registered\n", + card->platform->name); + return; + } + + ac97 = 0; + for (i = 0; i < card->num_links; i++) { + found = 0; + list_for_each_entry(dai, &dai_list, list) + if (card->dai_link[i].cpu_dai == dai) { + found = 1; + break; + } + if (!found) { + dev_dbg(card->dev, "DAI %s not registered\n", + card->dai_link[i].cpu_dai->name); + return; + } - if (machine->probe) { - ret = machine->probe(pdev); + if (card->dai_link[i].cpu_dai->ac97_control) + ac97 = 1; + } + + /* If we have AC97 in the system then don't wait for the + * codec. This will need revisiting if we have to handle + * systems with mixed AC97 and non-AC97 parts. Only check for + * DAIs currently; we can't do this per link since some AC97 + * codecs have non-AC97 DAIs. + */ + if (!ac97) + for (i = 0; i < card->num_links; i++) { + found = 0; + list_for_each_entry(dai, &dai_list, list) + if (card->dai_link[i].codec_dai == dai) { + found = 1; + break; + } + if (!found) { + dev_dbg(card->dev, "DAI %s not registered\n", + card->dai_link[i].codec_dai->name); + return; + } + } + + /* Note that we do not current check for codec components */ + + dev_dbg(card->dev, "All components present, instantiating\n"); + + /* Found everything, bring it up */ + if (card->probe) { + ret = card->probe(pdev); if (ret < 0) - return ret; + return; } - for (i = 0; i < machine->num_links; i++) { - struct snd_soc_dai *cpu_dai = machine->dai_link[i].cpu_dai; + for (i = 0; i < card->num_links; i++) { + struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; if (cpu_dai->probe) { ret = cpu_dai->probe(pdev, cpu_dai); if (ret < 0) @@ -827,13 +878,15 @@ static int soc_probe(struct platform_device *pdev) } /* DAPM stream work */ - INIT_DELAYED_WORK(&socdev->delayed_work, close_delayed_work); + INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work); #ifdef CONFIG_PM /* deferred resume work */ - INIT_WORK(&socdev->deferred_resume_work, soc_resume_deferred); + INIT_WORK(&card->deferred_resume_work, soc_resume_deferred); #endif - return 0; + card->instantiated = 1; + + return; platform_err: if (codec_dev->remove) @@ -841,15 +894,45 @@ platform_err: cpu_dai_err: for (i--; i >= 0; i--) { - struct snd_soc_dai *cpu_dai = machine->dai_link[i].cpu_dai; + struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; if (cpu_dai->remove) cpu_dai->remove(pdev, cpu_dai); } - if (machine->remove) - machine->remove(pdev); + if (card->remove) + card->remove(pdev); +} - return ret; +/* + * Attempt to initialise any uninitalised cards. Must be called with + * client_mutex. + */ +static void snd_soc_instantiate_cards(void) +{ + struct snd_soc_card *card; + list_for_each_entry(card, &card_list, list) + snd_soc_instantiate_card(card); +} + +/* probes a new socdev */ +static int soc_probe(struct platform_device *pdev) +{ + int ret = 0; + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_card *card = socdev->card; + + /* Bodge while we push things out of socdev */ + card->socdev = socdev; + + /* Bodge while we unpick instantiation */ + card->dev = &pdev->dev; + ret = snd_soc_register_card(card); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to register card\n"); + return ret; + } + + return 0; } /* removes a socdev */ @@ -857,11 +940,11 @@ static int soc_remove(struct platform_device *pdev) { int i; struct snd_soc_device *socdev = platform_get_drvdata(pdev); - struct snd_soc_machine *machine = socdev->machine; - struct snd_soc_platform *platform = socdev->platform; + struct snd_soc_card *card = socdev->card; + struct snd_soc_platform *platform = card->platform; struct snd_soc_codec_device *codec_dev = socdev->codec_dev; - run_delayed_work(&socdev->delayed_work); + run_delayed_work(&card->delayed_work); if (platform->remove) platform->remove(pdev); @@ -869,14 +952,16 @@ static int soc_remove(struct platform_device *pdev) if (codec_dev->remove) codec_dev->remove(pdev); - for (i = 0; i < machine->num_links; i++) { - struct snd_soc_dai *cpu_dai = machine->dai_link[i].cpu_dai; + for (i = 0; i < card->num_links; i++) { + struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; if (cpu_dai->remove) cpu_dai->remove(pdev, cpu_dai); } - if (machine->remove) - machine->remove(pdev); + if (card->remove) + card->remove(pdev); + + snd_soc_unregister_card(card); return 0; } @@ -898,6 +983,8 @@ static int soc_new_pcm(struct snd_soc_device *socdev, struct snd_soc_dai_link *dai_link, int num) { struct snd_soc_codec *codec = socdev->codec; + struct snd_soc_card *card = socdev->card; + struct snd_soc_platform *platform = card->platform; struct snd_soc_dai *codec_dai = dai_link->codec_dai; struct snd_soc_dai *cpu_dai = dai_link->cpu_dai; struct snd_soc_pcm_runtime *rtd; @@ -914,8 +1001,8 @@ static int soc_new_pcm(struct snd_soc_device *socdev, codec_dai->codec = socdev->codec; /* check client and interface hw capabilities */ - sprintf(new_name, "%s %s-%s-%d", dai_link->stream_name, codec_dai->name, - get_dai_name(cpu_dai->type), num); + sprintf(new_name, "%s %s-%d", dai_link->stream_name, codec_dai->name, + num); if (codec_dai->playback.channels_min) playback = 1; @@ -933,13 +1020,13 @@ static int soc_new_pcm(struct snd_soc_device *socdev, dai_link->pcm = pcm; pcm->private_data = rtd; - soc_pcm_ops.mmap = socdev->platform->pcm_ops->mmap; - soc_pcm_ops.pointer = socdev->platform->pcm_ops->pointer; - soc_pcm_ops.ioctl = socdev->platform->pcm_ops->ioctl; - soc_pcm_ops.copy = socdev->platform->pcm_ops->copy; - soc_pcm_ops.silence = socdev->platform->pcm_ops->silence; - soc_pcm_ops.ack = socdev->platform->pcm_ops->ack; - soc_pcm_ops.page = socdev->platform->pcm_ops->page; + soc_pcm_ops.mmap = platform->pcm_ops->mmap; + soc_pcm_ops.pointer = platform->pcm_ops->pointer; + soc_pcm_ops.ioctl = platform->pcm_ops->ioctl; + soc_pcm_ops.copy = platform->pcm_ops->copy; + soc_pcm_ops.silence = platform->pcm_ops->silence; + soc_pcm_ops.ack = platform->pcm_ops->ack; + soc_pcm_ops.page = platform->pcm_ops->page; if (playback) snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops); @@ -947,24 +1034,22 @@ static int soc_new_pcm(struct snd_soc_device *socdev, if (capture) snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops); - ret = socdev->platform->pcm_new(codec->card, codec_dai, pcm); + ret = platform->pcm_new(codec->card, codec_dai, pcm); if (ret < 0) { printk(KERN_ERR "asoc: platform pcm constructor failed\n"); kfree(rtd); return ret; } - pcm->private_free = socdev->platform->pcm_free; + pcm->private_free = platform->pcm_free; printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name, cpu_dai->name); return ret; } /* codec register dump */ -static ssize_t codec_reg_show(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t soc_codec_reg_show(struct snd_soc_device *devdata, char *buf) { - struct snd_soc_device *devdata = dev_get_drvdata(dev); struct snd_soc_codec *codec = devdata->codec; int i, step = 1, count = 0; @@ -1001,8 +1086,110 @@ static ssize_t codec_reg_show(struct device *dev, return count; } +static ssize_t codec_reg_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct snd_soc_device *devdata = dev_get_drvdata(dev); + return soc_codec_reg_show(devdata, buf); +} + static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL); +#ifdef CONFIG_DEBUG_FS +static int codec_reg_open_file(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; +} + +static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + ssize_t ret; + struct snd_soc_codec *codec = file->private_data; + struct device *card_dev = codec->card->dev; + struct snd_soc_device *devdata = card_dev->driver_data; + char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + ret = soc_codec_reg_show(devdata, buf); + if (ret >= 0) + ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); + kfree(buf); + return ret; +} + +static ssize_t codec_reg_write_file(struct file *file, + const char __user *user_buf, size_t count, loff_t *ppos) +{ + char buf[32]; + int buf_size; + char *start = buf; + unsigned long reg, value; + int step = 1; + struct snd_soc_codec *codec = file->private_data; + + buf_size = min(count, (sizeof(buf)-1)); + if (copy_from_user(buf, user_buf, buf_size)) + return -EFAULT; + buf[buf_size] = 0; + + if (codec->reg_cache_step) + step = codec->reg_cache_step; + + while (*start == ' ') + start++; + reg = simple_strtoul(start, &start, 16); + if ((reg >= codec->reg_cache_size) || (reg % step)) + return -EINVAL; + while (*start == ' ') + start++; + if (strict_strtoul(start, 16, &value)) + return -EINVAL; + codec->write(codec, reg, value); + return buf_size; +} + +static const struct file_operations codec_reg_fops = { + .open = codec_reg_open_file, + .read = codec_reg_read_file, + .write = codec_reg_write_file, +}; + +static void soc_init_codec_debugfs(struct snd_soc_codec *codec) +{ + codec->debugfs_reg = debugfs_create_file("codec_reg", 0644, + debugfs_root, codec, + &codec_reg_fops); + if (!codec->debugfs_reg) + printk(KERN_WARNING + "ASoC: Failed to create codec register debugfs file\n"); + + codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744, + debugfs_root, + &codec->pop_time); + if (!codec->debugfs_pop_time) + printk(KERN_WARNING + "Failed to create pop time debugfs file\n"); +} + +static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec) +{ + debugfs_remove(codec->debugfs_pop_time); + debugfs_remove(codec->debugfs_reg); +} + +#else + +static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec) +{ +} + +static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec) +{ +} +#endif + /** * snd_soc_new_ac97_codec - initailise AC97 device * @codec: audio codec @@ -1121,7 +1308,7 @@ EXPORT_SYMBOL_GPL(snd_soc_test_bits); int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid) { struct snd_soc_codec *codec = socdev->codec; - struct snd_soc_machine *machine = socdev->machine; + struct snd_soc_card *card = socdev->card; int ret = 0, i; mutex_lock(&codec->mutex); @@ -1140,11 +1327,11 @@ int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid) strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver)); /* create the pcms */ - for (i = 0; i < machine->num_links; i++) { - ret = soc_new_pcm(socdev, &machine->dai_link[i], i); + for (i = 0; i < card->num_links; i++) { + ret = soc_new_pcm(socdev, &card->dai_link[i], i); if (ret < 0) { printk(KERN_ERR "asoc: can't create pcm %s\n", - machine->dai_link[i].stream_name); + card->dai_link[i].stream_name); mutex_unlock(&codec->mutex); return ret; } @@ -1156,7 +1343,7 @@ int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid) EXPORT_SYMBOL_GPL(snd_soc_new_pcms); /** - * snd_soc_register_card - register sound card + * snd_soc_init_card - register sound card * @socdev: the SoC audio device * * Register a SoC sound card. Also registers an AC97 device if the @@ -1164,29 +1351,28 @@ EXPORT_SYMBOL_GPL(snd_soc_new_pcms); * * Returns 0 for success, else error. */ -int snd_soc_register_card(struct snd_soc_device *socdev) +int snd_soc_init_card(struct snd_soc_device *socdev) { struct snd_soc_codec *codec = socdev->codec; - struct snd_soc_machine *machine = socdev->machine; + struct snd_soc_card *card = socdev->card; int ret = 0, i, ac97 = 0, err = 0; - for (i = 0; i < machine->num_links; i++) { - if (socdev->machine->dai_link[i].init) { - err = socdev->machine->dai_link[i].init(codec); + for (i = 0; i < card->num_links; i++) { + if (card->dai_link[i].init) { + err = card->dai_link[i].init(codec); if (err < 0) { printk(KERN_ERR "asoc: failed to init %s\n", - socdev->machine->dai_link[i].stream_name); + card->dai_link[i].stream_name); continue; } } - if (socdev->machine->dai_link[i].codec_dai->type == - SND_SOC_DAI_AC97_BUS) + if (card->dai_link[i].codec_dai->ac97_control) ac97 = 1; } snprintf(codec->card->shortname, sizeof(codec->card->shortname), - "%s", machine->name); + "%s", card->name); snprintf(codec->card->longname, sizeof(codec->card->longname), - "%s (%s)", machine->name, codec->name); + "%s (%s)", card->name, codec->name); ret = snd_card_register(codec->card); if (ret < 0) { @@ -1216,12 +1402,13 @@ int snd_soc_register_card(struct snd_soc_device *socdev) if (err < 0) printk(KERN_WARNING "asoc: failed to add codec sysfs files\n"); + soc_init_codec_debugfs(socdev->codec); mutex_unlock(&codec->mutex); out: return ret; } -EXPORT_SYMBOL_GPL(snd_soc_register_card); +EXPORT_SYMBOL_GPL(snd_soc_init_card); /** * snd_soc_free_pcms - free sound card and pcms @@ -1239,10 +1426,11 @@ void snd_soc_free_pcms(struct snd_soc_device *socdev) #endif mutex_lock(&codec->mutex); + soc_cleanup_codec_debugfs(socdev->codec); #ifdef CONFIG_SND_SOC_AC97_BUS for (i = 0; i < codec->num_dai; i++) { codec_dai = &codec->dai[i]; - if (codec_dai->type == SND_SOC_DAI_AC97_BUS && codec->ac97) { + if (codec_dai->ac97_control && codec->ac97) { soc_ac97_dev_unregister(codec); goto free_card; } @@ -1756,8 +1944,8 @@ EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8); int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int freq, int dir) { - if (dai->dai_ops.set_sysclk) - return dai->dai_ops.set_sysclk(dai, clk_id, freq, dir); + if (dai->ops.set_sysclk) + return dai->ops.set_sysclk(dai, clk_id, freq, dir); else return -EINVAL; } @@ -1776,8 +1964,8 @@ EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk); int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div) { - if (dai->dai_ops.set_clkdiv) - return dai->dai_ops.set_clkdiv(dai, div_id, div); + if (dai->ops.set_clkdiv) + return dai->ops.set_clkdiv(dai, div_id, div); else return -EINVAL; } @@ -1795,8 +1983,8 @@ EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv); int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, unsigned int freq_in, unsigned int freq_out) { - if (dai->dai_ops.set_pll) - return dai->dai_ops.set_pll(dai, pll_id, freq_in, freq_out); + if (dai->ops.set_pll) + return dai->ops.set_pll(dai, pll_id, freq_in, freq_out); else return -EINVAL; } @@ -1805,15 +1993,14 @@ EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll); /** * snd_soc_dai_set_fmt - configure DAI hardware audio format. * @dai: DAI - * @clk_id: DAI specific clock ID * @fmt: SND_SOC_DAIFMT_ format value. * * Configures the DAI hardware format and clocking. */ int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { - if (dai->dai_ops.set_fmt) - return dai->dai_ops.set_fmt(dai, fmt); + if (dai->ops.set_fmt) + return dai->ops.set_fmt(dai, fmt); else return -EINVAL; } @@ -1831,8 +2018,8 @@ EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt); int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int mask, int slots) { - if (dai->dai_ops.set_sysclk) - return dai->dai_ops.set_tdm_slot(dai, mask, slots); + if (dai->ops.set_sysclk) + return dai->ops.set_tdm_slot(dai, mask, slots); else return -EINVAL; } @@ -1847,8 +2034,8 @@ EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot); */ int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate) { - if (dai->dai_ops.set_sysclk) - return dai->dai_ops.set_tristate(dai, tristate); + if (dai->ops.set_sysclk) + return dai->ops.set_tristate(dai, tristate); else return -EINVAL; } @@ -1863,21 +2050,242 @@ EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate); */ int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute) { - if (dai->dai_ops.digital_mute) - return dai->dai_ops.digital_mute(dai, mute); + if (dai->ops.digital_mute) + return dai->ops.digital_mute(dai, mute); else return -EINVAL; } EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute); -static int __devinit snd_soc_init(void) +/** + * snd_soc_register_card - Register a card with the ASoC core + * + * @param card Card to register + * + * Note that currently this is an internal only function: it will be + * exposed to machine drivers after further backporting of ASoC v2 + * registration APIs. + */ +static int snd_soc_register_card(struct snd_soc_card *card) +{ + if (!card->name || !card->dev) + return -EINVAL; + + INIT_LIST_HEAD(&card->list); + card->instantiated = 0; + + mutex_lock(&client_mutex); + list_add(&card->list, &card_list); + snd_soc_instantiate_cards(); + mutex_unlock(&client_mutex); + + dev_dbg(card->dev, "Registered card '%s'\n", card->name); + + return 0; +} + +/** + * snd_soc_unregister_card - Unregister a card with the ASoC core + * + * @param card Card to unregister + * + * Note that currently this is an internal only function: it will be + * exposed to machine drivers after further backporting of ASoC v2 + * registration APIs. + */ +static int snd_soc_unregister_card(struct snd_soc_card *card) +{ + mutex_lock(&client_mutex); + list_del(&card->list); + mutex_unlock(&client_mutex); + + dev_dbg(card->dev, "Unregistered card '%s'\n", card->name); + + return 0; +} + +/** + * snd_soc_register_dai - Register a DAI with the ASoC core + * + * @param dai DAI to register + */ +int snd_soc_register_dai(struct snd_soc_dai *dai) +{ + if (!dai->name) + return -EINVAL; + + /* The device should become mandatory over time */ + if (!dai->dev) + printk(KERN_WARNING "No device for DAI %s\n", dai->name); + + INIT_LIST_HEAD(&dai->list); + + mutex_lock(&client_mutex); + list_add(&dai->list, &dai_list); + snd_soc_instantiate_cards(); + mutex_unlock(&client_mutex); + + pr_debug("Registered DAI '%s'\n", dai->name); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_register_dai); + +/** + * snd_soc_unregister_dai - Unregister a DAI from the ASoC core + * + * @param dai DAI to unregister + */ +void snd_soc_unregister_dai(struct snd_soc_dai *dai) +{ + mutex_lock(&client_mutex); + list_del(&dai->list); + mutex_unlock(&client_mutex); + + pr_debug("Unregistered DAI '%s'\n", dai->name); +} +EXPORT_SYMBOL_GPL(snd_soc_unregister_dai); + +/** + * snd_soc_register_dais - Register multiple DAIs with the ASoC core + * + * @param dai Array of DAIs to register + * @param count Number of DAIs + */ +int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count) +{ + int i, ret; + + for (i = 0; i < count; i++) { + ret = snd_soc_register_dai(&dai[i]); + if (ret != 0) + goto err; + } + + return 0; + +err: + for (i--; i >= 0; i--) + snd_soc_unregister_dai(&dai[i]); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_register_dais); + +/** + * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core + * + * @param dai Array of DAIs to unregister + * @param count Number of DAIs + */ +void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count) +{ + int i; + + for (i = 0; i < count; i++) + snd_soc_unregister_dai(&dai[i]); +} +EXPORT_SYMBOL_GPL(snd_soc_unregister_dais); + +/** + * snd_soc_register_platform - Register a platform with the ASoC core + * + * @param platform platform to register + */ +int snd_soc_register_platform(struct snd_soc_platform *platform) +{ + if (!platform->name) + return -EINVAL; + + INIT_LIST_HEAD(&platform->list); + + mutex_lock(&client_mutex); + list_add(&platform->list, &platform_list); + snd_soc_instantiate_cards(); + mutex_unlock(&client_mutex); + + pr_debug("Registered platform '%s'\n", platform->name); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_register_platform); + +/** + * snd_soc_unregister_platform - Unregister a platform from the ASoC core + * + * @param platform platform to unregister + */ +void snd_soc_unregister_platform(struct snd_soc_platform *platform) { - printk(KERN_INFO "ASoC version %s\n", SND_SOC_VERSION); + mutex_lock(&client_mutex); + list_del(&platform->list); + mutex_unlock(&client_mutex); + + pr_debug("Unregistered platform '%s'\n", platform->name); +} +EXPORT_SYMBOL_GPL(snd_soc_unregister_platform); + +/** + * snd_soc_register_codec - Register a codec with the ASoC core + * + * @param codec codec to register + */ +int snd_soc_register_codec(struct snd_soc_codec *codec) +{ + if (!codec->name) + return -EINVAL; + + /* The device should become mandatory over time */ + if (!codec->dev) + printk(KERN_WARNING "No device for codec %s\n", codec->name); + + INIT_LIST_HEAD(&codec->list); + + mutex_lock(&client_mutex); + list_add(&codec->list, &codec_list); + snd_soc_instantiate_cards(); + mutex_unlock(&client_mutex); + + pr_debug("Registered codec '%s'\n", codec->name); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_register_codec); + +/** + * snd_soc_unregister_codec - Unregister a codec from the ASoC core + * + * @param codec codec to unregister + */ +void snd_soc_unregister_codec(struct snd_soc_codec *codec) +{ + mutex_lock(&client_mutex); + list_del(&codec->list); + mutex_unlock(&client_mutex); + + pr_debug("Unregistered codec '%s'\n", codec->name); +} +EXPORT_SYMBOL_GPL(snd_soc_unregister_codec); + +static int __init snd_soc_init(void) +{ +#ifdef CONFIG_DEBUG_FS + debugfs_root = debugfs_create_dir("asoc", NULL); + if (IS_ERR(debugfs_root) || !debugfs_root) { + printk(KERN_WARNING + "ASoC: Failed to create debugfs directory\n"); + debugfs_root = NULL; + } +#endif + return platform_driver_register(&soc_driver); } -static void snd_soc_exit(void) +static void __exit snd_soc_exit(void) { +#ifdef CONFIG_DEBUG_FS + debugfs_remove_recursive(debugfs_root); +#endif platform_driver_unregister(&soc_driver); } |